Package io.delta.kernel.internal.util

Class VectorUtils

Object
io.delta.kernel.internal.util.VectorUtils
public final class VectorUtils extends Object

  • Method Details

    • toJavaList

      public static <T> List<T> toJavaList(ArrayValue arrayValue)
      Converts an ArrayValue to a Java list. Any nested complex types are also converted to their Java type.

    • toJavaMap

      public static <K, V> Map<K,V> toJavaMap(MapValue mapValue)
      Converts a MapValue to a Java map. Any nested complex types are also converted to their Java type.

      Please note not all key types override hashCode/equals. Be careful when using with keys of: - Struct type at any nesting level (i.e. ArrayType(StructType) does not) - Binary type

    • stringStringMapValue

      public static MapValue stringStringMapValue(Map<String,String> keyValues)
      Creates a MapValue from map of string keys and string values. The type map(string -> string) is a common occurrence in Delta Log schema.
      Parameters:
      keyValues -
      Returns:

    • buildArrayValue

      public static ArrayValue buildArrayValue(List<?> values, DataType dataType)
      Creates an ArrayValue from list of objects.

    • buildColumnVector

      public static ColumnVector buildColumnVector(List<?> values, DataType dataType)
      Utility method to create a ColumnVector for given list of object, the object should be primitive type or an Row instance.
      Parameters:
      values - list of strings
      Returns:
      a ColumnVector with the given values type.